Ditzel



Feb. 9, 1960 1 DlTzEL Re. 24,778

DISPENSING DEVICE FOR STRIP MATERIAL Grginal Filed July 2. 1953 5Sheets-Sheet` 1 Fel). 9, 1960 J, DlTzEL Re. 24,778

DISPENSING DEVICE FOR STRIP MATERIAL Original Filed July 2, 1953 3Sheets-Sheet 2 Feb. 9, 1960 J, DITZEL Re. 24,778

DISPENSING DEVICE FOR STRIP MATERIAL Original Filed July 2, 1953 3Sheets-Sheet 5 /15 z. 21 mi 405 4oz "409 42/ United States Patent()DISPENSING DEVICE FOR STRIP MATERIAL Johannes Ditzel, Kilianstadten,Germany Original No. 2,789,818, dated 'April 23, 1957, Serial No.365,738, July 2, 1953. Application for reissue June 4, 1958, Serial No.739,958

Claims priority, application Germany October 27, 1952 12 Claims. (Cl.271-2.4)

Matter enclosed in heavy brackets appears in the original patent butforms no part of this reissue specification; matter printed in italicsindicates the additions made by reissue.

For dispensing strips of tape adapted to be pulled from a supply roll,in particular adhesive strips for packing purposes, devices have beendeveloped which are adjustable within limits to any desired deliverylengths. In the known constructions of devices of this type, however,when the adjustment has been made either only the same length can bedelivered in the successive operations, or two or more dilerent lengthscan be delivered in a predetermined sequence. This is due to the factthat with these devices the control disc by which lthe length to bedelivered is determined, although rotating intermittently, alwaysrotates in the same direction, so that after each revolution the controlcycle set thereon is repeated. If, for example, one longer strip and oneshorter strip are required to seal a box, the known devices can beadjusted to deliver these two strips alternately, but, for example,after having delivered one shorter strip they cannot deliver a furthershorter strip when required.

The invention concerns a new design of a dispensing device for stripsadapted to be pulled from a supply roll, especially for adhesive stripsfor packing purposes, comprising means for the pre-adjustment of thelengths to be delivered at each operation, by means of which it ispossible to produce the desired alternation in the preadjusted lengths,so that when the device is pre-adjusted to dispense two dilerentlengths, the longer or the shorter strip is delivered in any desiredsequence.

[In accordance with the invention, this object is achieved owing to thefact that in a device for dispensing strips to be pulled from a supplyroll, in particular adhesive strips for packing purposes, withpre-adjustment of the length to be delivered in each operation by meansof a feed roller, adapted to be intermittently driven, for the strip, apressing roller mounted on a rocking member, and carrying the severingblade on the counter-arm, and a control disc driven with the feed rollerand comprising disengaging members associated with the rocking member,the control disc is constructed as a return disc adapted to be drivenagainst spring action by the drive, the disengaging members areadjustably arranged in different paths on the control disc, and thecounter-element of the rocking member is adapted to be changed over tothe paths of the various disengaging members] In accordance with theinvention, this object is achieved in a device having a supply roll for'the adhesive strip Lfrom which roll strips, and in particular stripsfor packing purposes, are drawn, severed and dispensed, withpreadjustrnent of the length to be delivered at each operation. For thispurpose a feed roller is provided to intermittently draw the strip fromthe supply roll, and a pressing roll, corresponding with the feedroller, is mounted on a rocking member which also carries the severingblade on a counter arm. A rotatably controlled disk, provided with aspring return, is driven from the shaft of the feed roller, upon whichdisk disengagng ICC members are adjustably arranged in dierent planes todisengage the pressing roller from the feed roller and interrupt theijeed. Preferably, the disengaging members are arranged in juxtapositionon the periphery of the control disc, while a number of switch memberstripping the drive, corresponding to the number of disengaging members,are provided which change-over the counter-element on the rocking memberto the disengaging member corresponding to the key in question.

By means of this design, the result is achieved that when the additionalkey is depressed the feed drive for the strip is engaged for theduration of the depression, the automatic disconnecting device beingdisengaged, and when this key is released the feed is stopped and thestrip' which has been conveyed until this instant is cut oit.

For a better understanding of the invention and to show how it may becarried into effect, the same will now be described, by way of example,with reference to the accompanying drawings, in which:

Figure l is a side elevation of the device,

Figure 2 is a plan view,

Figure 3 is a section through the conveyor drive,

Figure 4 shows the switching arrangement on a larger scale,

Figure 5 is a plan view of the change-over arrangement,

Figure 6 is a side elevation of a device with the third key,

Figure 7 shows on a larger scale the switching arrangement influenced bythe said key, and

Figure 8 is a view in the direction of the arrow A of Figure 7.

The constructional example is a dispensing device with power drive,which can be connected to the feed drive for each operation by aswitching arrangement,

The frame 1 of the device supports an electric motor 2 which drivesthrough a gearing 3 a shaft 4 which is coupled through a universal joint5 with the gearing 3 and supports on its opposite end a pinion 6. Nearto the pinion 6, the shaft 4 is held by a bearing bracket 7 of a lever8, which is pivotally mounted on a pin 17 on the cheek 18 of theframe 1. Associated with the pinion 6 is the inner annulus 9 0f acontrol disc 10 which is mounted for rotation against the action of areturn spring 11 o-n the cheek 18. The control disc 10 in theconstructional example supports in an annular groove 12 two stops 13, 14which are guided at different depths over the surrounding surface of thedisc 10. However, each of these control stops may be displaceable in aseparate annular groove in the disc 10.

The shaft 4 supports a feed roller 15 for the adhesive strip, with whicha counter-roller 16 is associated. The lever 8 is loaded by a spring 19which so influences it that the pinion 6 constantly driven by the motor2 is not in engagement with the toothed annulus 9.

The counter-roller 16 is mounted with its supporting spindle 20 on arocking member 21, which is pivotally mounted by means of the pin 22 onthe cheeks 18, 23 and supports at the opposite end the severing blade24, with which a counter-blade 44 is associated. The rocking member 21is urged clockwise about pin 22 by a spring 25 to urge thecounter-roller 16 into Contact with the feed roller 15. The end of thesupporting spindle 20 of the counter-roller 16 is extended beyond thecheek 18, at which end a control roller 26 is slidably mounted thereon.The roller 26 has a recess 27 in which a projection 28a on a fork 28 ofan adjustment lever 29 is guided. The adjustment lever 29 is swingablyguided about an axle 30a in a slot 30 in pin 22 and terminates in acontrol lug 31. The latter has in both sides thereofv recesses 32 inwhich the upwardly bent arms 33, 34 of two operating keys 35, 36 engage.The operating keys 35, 36 are pivotally mounted on a pin 37 and eachcomprise a nger 38, 39 engaging below a bent-over end portionk 40 of thelever 8.

The lever 8 is provided with an upwardly bent abutment 41 with which alug 42 on rocking member 21 is associated.

yThe shaft 4 also supports a pinion 46, which is coupled through a chain47 with the driving pinion 48 of the moistening cylinder 49, which dipsinto a water-filled trough 45. Due to the fact that the cylinder 49 isdriven by the shaft 4, the result is obtained that the cylinder 49 isset in rotation when the driving motor 2 is switched on. The drive ofthe moistening cylinder 49 is consequently independent of the forwardfeed drive for the adhesive strip, which is only coupled by thedepression of one of the two keys 35,y 36.V The adhesive strip fedforward after the depression of one of the keys 35, 36 consequentlyencounters the cylinder 49 moistened over its entire surface by itsrotation in the water in the trough 45, and is consequently alsomoistened from its very beginning as it slides over the cylinder 49.

In order to set the device in operation, the two stops 13, 14 areadjusted to the two lengths to be severed. By depression of one of thetwo keys 35, 36 kthe lever 8 is lifted by the finger 38 or 39 againstthe action of the spring 19, so that the pinion 6 engages with thetoothed annulus 9 and drives the control disc 10. When the lever 8 islifted, the stop 41, on which the projection 42 lies in the initialposition, is also swung out and releases the projection 42, so that therocking member 21 is released for applying the counter-roller 16 againstthe conveyor roller 15. Moreover, on depression of one of the keys 35,36 the adjustment lever 29 has been so swung out by the arm 33, 34 ofthe key in question that the control roller 26 lies in the path of oneor other of the stops 13, 14 where it remains until the adjustment lever29 is swung out once more by actuation of one of the keys 35, 3s.

On release of the depressed key 35, 36 the lever 8 tends to return intothe initial position, but the stop 41 thereof thus bears against theprojection 42 of the rocking member. The lever consequently remains inthe driving position until, by the impact of one or other of the stops13, 14 against the control roller 26, the latter is lifted with theadjusting lever 29 and the rocking member 21. The projection 42 thusreleases the stop 41, and the lever 8 returns into the initial position.The pinion 6 is disengaged from the toothed annulus 9, so that the disc10 returns under the action of the spring 11 into the initial position.This initial position is determined by an end stop (not shown) for thedisc 10.

With the lifting of the rocking member 21, the counterroller 16 has alsobeen lifted from the feed roller 15 and the blade 24 has been presseddown to effect the cutting. With the release of the control roller 26 bythe stop 13 or 14 returning with the disc 10, the rocking member 21 alsotends to return into the initial position under the action of the spring25. The projection 42 thus encounters the stop 41, so that the perimeterof the counterroller 16 is held at a short distance from the perimeterof the returning feed roller. Consequently, the end of the strip is notpushed back when the feed roller 15 is returned by a return motion ofthe shaft 4 caused by an engagement of the pinion 6 with the toothedannulus 9 during the return of the control disc l0.

Thus, depending upon which of the keys 35 and 36 is depressed, twostrips of different lengths are alternately fed, while any desirednumber of longer or shorter strips can be successively removed.

In order that sections of any desired length which have not been pre-setmay also be removed from the device with this drive construction, thereis provided in association with the lever 8 a draw rod 102 which isOperable by means f a key lever 101 mounted ou the 4 side cheek 18. Thedraw rod 102 has formed therein a slot 106 in which a pin 107 of thelever 8 engages. The lever 8 can consequently be operated according tochoice by depression of one of the keys 35, 36 or 101.

The key lever 101 is coupled with one arm 21 of the rocking member by apair of toggle levers 104, which are so arranged that they are broughtinto the extended position by depression of the key 101 and under theaction of a spring 108 engaging between the key lever 101 and the arm105.

The draw rod 102 supports a cam 103 extending through a recess 109 inthe side cheek 18, which cam lies, when the draw rod 102 is in itsinitial position, under the control lever 29, but rocks the latter-outwardly when lifted 'and thus brings it into a central position inwhich it brings the roller 26 into an inoperative lateral positionoutside the two stops 13, 14.

Thus, on depression of the key lever101 the drive 4, 6 is coupled forthe duration of the depression and the rocking member is released so asto apply the pressing roller 16 against the feed roller 15.Consequently, the strip is fed forward until the key lever 101 isreleased again. On release of the key lever 101, which is under theaction of the return spring 108, the rocking member returns into theinitial position. The rocking member is thus rocked in thecounter-clockwise direction by the pair of toggle levers 104, 105,situated in the extended position, so that the pressing roller 16 islifted from the feed roller 15 and the blade 24 is lowered against thecounter-surface.

Associated with the pair of toggle levers 104, 105 on the side cheek 18is an abutment 111, which, shortly before the key lever 101 reaches theinitial position, inwardly hinges the pair of toggle levers 104, 105 andconsequently permits the rocking member to return into the initialposition.

Thus it is seen that the lever 8 is coupled with the draw rod 102 by theslot 106 and the pin 107 engaging the same. In consequence thereof, thelever 8 may be swung out by actuating the key levers 35, 36 independ.

ently of the position of the draw rod 102.

The draw rod 102 is coupled with the key 101 so as to lift by adepression of the key lever 101 the draw rod 102 which causes a swingingmotion of the lever 8.

Furthermore, the key lever 101 is coupled with the arm 21 of the rockingmember by a pair of toggle levers 104, 105. By depressing the key lever101 the toggle lever 104, 105 is brought into the extended positionthereof by the spring 108 engaging the arm 105.

Thus the following effects are obtained:

When the key lever 101 is depressed, the pinion 6 is brought toengagement with the inner toothed annulus 9 by the draw rod 102 engagingthe pin 107 attached to the lever 8. In consequence thereof the feed ofthe strip is started.

Simultaneously therewith by the stretching of the toggle lever 104, 105the arm 21 of the rocking member is swung so as to cause thecounter-roller 16 to engage the feed roller 15, this position beingsecured by the return spring 108. Only when the key lever 101 isreleased, the pinion 6 is [lifted] moved out of engagement with theinner toothed annulus 9, thus making an end to the feed of the strip.The toggle lever 104, 105 is brought out of the extended positionthereof, so that the arm 21 is swung into the other end positionthereof, thus enabling the knife to carry out the severing cut, thecounter-roller 16 being lifted from the feed roller.

It is thus possible by means of this new additional arrangement toremove from the device, apart from the pre-set lengths, any length ofstrip, judged by the eye, by depression of the further key, this lengthdepending only upon the period for which the said further key isdepressed.

I claim:

1. In anevice for dispensing, strips; a .feed roller. a

lrocking member, and a pressing roller mounted on said rocking member, acontrol disc adapted for being coupled to said feed roller, drivingmeans for driving said feed roller and adapted to be coupled in drivingengagement to said control disc at certain portions of the operatingcycle, a spring means connected to said control disc for returning thesame to the initial position thereof when the same has been driven bysaid driving means, manually operable control means for coupling saiddrive means to said control disc and rocking said rocking member to urgesaid pressing roller against said feed roller, disengaging membersmounted on said control disc and-positioned to actuate said rockingmember to thereby urge said pressing roller away from said feed roller,said disengaging members being adjustably secured respectively indiiferent positions on opposite sides of a plane of said control disc,and a control roller supported by said rocking member for engaging saiddisengaging members, said control means shifting said control rollerselectively to a side of said control disc plane corresponding to one ofsaid different positions of said disengaging members while rocking saidrocking member, the actuation of said rocking member by said disengagingmember disengaging said drive means from said control disc.

2. In a device as claimed in claim 1, said control disc having anannular groove on one side face thereof, said disengaging members beingdisposed in said annular groove and securable in different positions,and cam surfaces, forming part, respectively, of said disengagingmembers for engagement with said control roller.

3. In a device as claimed in claim 2, an adjustment lever supported bysaid rocking member so as to be rockable in a plane, said adjustmentlever having one end forked to receive said control roller, controlsurfaces provided at the other end of said adjustment lever for shiftingthe same, and key levers engaging said control surfaces for shiftingsaid adjustment lever.

4. In a device as claimed in claim l, key levers, a constantly drivenpower device, a toothed annulus forming part of said control disc, apinion coupled with said power device and adapted to engage said toothedannulus, said driving means of said control disc including a drivingshaft supporting said pinion, and a rocking lever carrying said drivingshaft supporting said pinion, said rocking lever being lifted by saidkey levers for engagement of said pinion with said toothed annulus.

5. In a device as claimed in claim 4, said feed roller being arranged onsaid driving shaft supporting said p1n1on.

6. A tape-dispensing mechanism comprising a frame, a shaft rotatablymounted on said frame having a feed roller thereon, means for rotatingsaid shaft, a pressing roller, a spindle upon which said pressing rolleris mounted, said spindle being mounted for movement of said pressingroller toward and from said feed roller, a control disc rotatablymounted on said frame, means for coupling said feed roller shaft to saiddisc to rotate the latter, manually operable means for simultaneouslyeffecting said ooupling and moving said pressing roller toward said feedroller, cam means on said control disc, control means on said spindlewith which said cam means engages to move said pressing roller out ofengagement with said feed roller and simultaneously uncouple said feedroller shaft from said disc, and spring means to return said disc to itsoriginal position.

7. A tape-dispensing mechanism as in claim 6 wherein a plurality of saidcam means are provided on said disc, and said control means is movableaxially on said spindle on which it is mounted to engage a selected oneof said cam means.

8. A tape-dispensing mechanism as in claim 6 wherein a plurality of saidcam` means are provided on said disc, said control means is movableaxially ion said spindle on which it is mounted to engage a selected`one of said cam means, and said cam means being shiftable to` variouspositions on said disc to vary the length of tape delivered.

9. A tape-dispensing mechanism as in claim 6 wherein a plurality of saidcam means are provided on said disc, said contnol means is movableaxially on said spindie on which. it is mounted tto engage a selectedone of said cam means, and said manually operable means being connectedto said control means to move it alongr said spindle.

10. A tape-dispensing mechanism comprising a frame, a feed rollermounted o-n the frame, a rocking member, a pressing roller mounted onsaid rocking member adjacent said feed roller to cooperate therewith tofeed at strip of tape therebetween, a control dise, driving means forsaid feed roller adapted to'be coupled to said control disc to actuatethe latter at certain portions of the operating cycle, spring means toreturn said control disc to initial position after actuation by saiddriving means, manually operable control means for coupling said drivingmeans to said control disc and simultaneously urging said pressingroller toward said feed roller, disengaging members mounted on saidcontrol disc, a control member movably mounted on said rocking memberfor movement to position to be engaged by said disengaging members tomove said rocking member and move said pressing roller carrie-d therebyaway from said feed roller, means simultaneously dsengaging said drivingmeans from said control disc, and said driving means comprising a shaftrotatably mounted in said frame and adapted for movement in a directiontransverse to its axis to be engaged with said control disc.

11. A tape-dispensing mechanism comprising a frame, a feed rollerrotatably mounted thereon, means for driving said roller, a rockingmember rotatably mounted on said frame, a pressing roller carried bysaid rocking member and adapted to cooperate withrsaid feed roller tofeed a strip of tape, means urging said pressing roller into engagementwith said feed roller, means for latching said presser roller out ofengagement with said feed roller, a control disk, manually operablemeans for simultaneously coupling said control disk to said drivingmeans for rotation of said disk and releasing said latching means topermit engagement of said rollers, a control member also carried by saidrocking member, means on said control disk to engage said control memberand more said pressing roller out of contact with said feed noller upona predetermined movement of said control disk to discontinue feeding ofthe tape and uncoupling said control disk from said driving means, andmeans to return said control disk to its original position.

12. A tape-dispensing mechanism as in claim 11 wherein spring means isprovided to return said control disk to its original position.

References Cited in the le of this patent or the original patent UNITEDSTATES PATENTS Re. 20,180 Gautier et al. Nov. 24, 1936 1,652,715 HanscomDec. 13, 1927 1,732,635 Chabot t Oct. 22, 1929 1,960,945 Krueger May 29,1934 1,981,229 Gillet Nov. 20, 1934 2,133,868 Morton Oct. 18, 19382,408,363 Beckman et al. Oct. l, 1946 2,616,689 Baumgartner Nov. 4, 1952

